Evidence for extended gaseous reservoirs around AGN at cosmic noon from ALMA CO(3-2) observations

Abstract

Gaseous outflows are key phenomena in the evolution of galaxies, as they affect star formation (either positively or negatively), eject gas from the core or disk, and directly cause mixing of pristine and processed material. Active outflows may be detected through searches for broad spectral line emission or high-velocity gas, but it is also possible to determine the presence of past outflows by searching for extended reservoirs of chemically enriched molecular gas in the circumgalactic medium (CGM) around galaxies. In this work, we examine the CO(3-2) emission of a set of seven z~2.0-2.5 AGN host galaxies, as observed with ALMA. Through a three-dimensional stacking analysis we find evidence for extended CO emission of radius r~13kpc. We extend this analysis to the HST/ACS i-band images of the sample galaxies, finding a complex small-scale (r<10kpc) morphology but no robust evidence for extended emission. In addition, the dust emission (traced by rest-frame FIR emission) shows no evidence for significant spatial extension. This indicates that the diffuse CO emission revealed by ALMA is morphologically distinct from the stellar component, and thus traces an extended reservoir of enriched gas. The presence of a diffuse, enriched molecular reservoir around this sample of AGN host galaxies at cosmic noon hints at a history of AGN-driven outflows that likely had strong effects on the star formation history of these objects.

arXiv comment18 pages, 11 figures. Accepted for publication in MNRAS

References in corpus (87)

• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
• The CO-to-H2 Conversion Factor
• The Cosmic Evolution Survey (COSMOS) -- Overview
• Star Formation in AEGIS Field Galaxies since z=1.1 : The Dominance of Gradually Declining Star Formation, and the Main Sequence of Star-Forming Galaxies
• A computer program for fast non-LTE analysis of interstellar line spectra
• X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
• CIGALE: a python Code Investigating GALaxy Emission
• The Circumgalactic Medium
• Cool Gas in High Redshift Galaxies
• Information criteria for astrophysical model selection
• The COSMOS Survey: Hubble Space Telescope / Advanced Camera for Surveys (HST/ACS) Observations and Data Processing
• AGN wind scaling relations and the co-evolution of black holes and galaxies
• COSMOS : Hubble Space Telescope Observations
• The Interstellar Medium In Galaxies Seen A Billion Years After The Big Bang
• Evidence of strong quasar feedback in the early Universe
• The Birth of a Galaxy - III. Propelling reionisation with the faintest galaxies
• A General Model for the CO-H2 Conversion Factor in Galaxies with Applications to the Star Formation Law
• Black hole variability and the star formation-AGN connection: Do all star-forming galaxies host an AGN?
• A Herschel [CII] Galactic plane survey I: the global distribution of ISM gas components
• The COS-Halos Survey: Metallicities in the Low-Redshift Circumgalactic Medium
• The XXL Survey: I. Scientific motivations - XMM-Newton observing plan - Follow-up observations and simulation programme
• Feedback from Central Black Holes in Elliptical Galaxies: Two-dimensional Models Compared to One-dimensional Models
• The ALPINE-ALMA [CII] Survey: data processing, catalogs, and statistical source properties
• Cold Molecular Outflows in the Local Universe
• The [C II] emission as a molecular gas mass tracer in galaxies at low and high redshift
• A massive core for a cluster of galaxies at a redshift of 4.3
• ALMA Imaging and Gravitational Lens Models of South Pole Telescope-Selected Dusty, Star-Forming Galaxies at High Redshifts
• Reionization Era Bright Emission Line Survey: Selection and Characterization of Luminous Interstellar Medium Reservoirs in the z>6.5 Universe
• The COS-Halos Survey: Origins of the Highly Ionized Circumgalactic Medium of Star-Forming Galaxies
• Modelling the spectral energy distribution of galaxies. V. The dust and PAH emission SEDs of disk galaxies
• The stellar-to-halo mass relation over the past 12 Gyr
• Tracing the total molecular gas in galaxies: [CII] and the CO-dark gas
• Gas filaments of the cosmic web located around active galaxies in a proto-cluster
• The Physical Nature of Starburst-Driven Galactic Outflows
• The ALPINE-ALMA [CII] Survey: Multi-Wavelength Ancillary Data and Basic Physical Measurements
• Molecular outflows in local galaxies: Method comparison and a role of intermittent AGN driving
• The ALPINE-ALMA [CII] Survey: Size of Individual Star-Forming Galaxies at z=4-6 and their Extended Halo Structure
• First Identification of 10-kpc Scale [CII] 158um Halos around Star-Forming Galaxies at z=5-7
• Detection of HI in distant galaxies using spectral stacking
• Normal, Dust-Obscured Galaxies in the Epoch of Reionization
• Zooming on the internal structure of $z\simeq 6$ galaxies
• SUPER-II: Spatially resolved ionized gas kinematics and scaling relations in z~2 AGN host galaxies
• Low-J CO Line Ratios From Single Dish CO Mapping Surveys and PHANGS-ALMA
• Widespread QSO-driven outflows in the early Universe
• Inspiraling Halo Accretion Mapped in Lyman-$\alpha$ Emission around a $z\sim 3$ Quasar
• Kinematics of $z\ge 6$ galaxies from [CII] line emission
• The Inside-out Growth of the Galactic Disk
• Molecular Gas in the Halo Fuels the Growth of a Massive Cluster Galaxy at High Redshift
• A spatially resolved study of cold dust, molecular gas, HII regions, and stars in the $z=2.12$ submillimeter galaxy ALESS67.1
• A kiloparsec view of a typical star-forming galaxy when the Universe was ~1 Gyr old. Part I. Outflow, halo, and interstellar medium properties
• ALMA suggests outflows in z~5.5 galaxies
• Fast Molecular Outflow from a Dusty Star-Forming Galaxy in the Early Universe
• The ALPINE-ALMA [CII] Survey: Kinematic Diversity & Rotation in Massive Star Forming Galaxies at z~4.4-5.9
• Starbursting [O III] emitters and quiescent [C II] emitters in the reionization era
• The Discovery of Gas-Rich, Dusty Starbursts in Luminous Reddened Quasars at $z\sim 2.5$ with ALMA
• Molecular gas on large circumgalactic scales at z=3.47
• Outflows and extended [CII] halos in high redshift galaxies
• The ALPINE-ALMA [CII] survey: The contribution of major mergers to the galaxy mass assembly at z~5
• ALMA reveals extended cool gas and hot ionized outflows in a typical star-forming galaxy at $z=7.13$
• Two-Face(s): ionized and neutral gas winds in the local Universe
• SUPER I. Toward an unbiased study of ionized outflows in z~2 active galactic nuclei: survey overview and sample characterization
• ALMA Observations of a Candidate Molecular Outflow in an Obscured Quasar
• Physical constraints on the extended interstellar medium of the z=6.42 quasar J1148+5251: [CII] 158um, [NII] 205um and [OI] 146um observations
• Molecular Gas Properties and CO-to-H2 Conversion Factors in the Central Kiloparsec of NGC 3351
• Molecular gas in z~6 quasar host galaxies
• Galaxy Sizes Since $z=2$ from the Perspective of Stellar Mass Distribution within Galaxies
• Dependence of $X_{\mathrm{CO}}$ on metallicity, intensity, and spatial scale in a self-regulated interstellar medium
• Blandford-Znajek jets in galaxy formation simulations: exploring the diversity of outflows produced by spin-driven AGN jets in Seyfert galaxies
• SUPER IV. CO(J=3-2) properties of active galactic nucleus hosts at cosmic noon revealed by ALMA
• A Comparison of the Stellar, CO and Dust-Continuum Emission from Three, Star-Forming HUDF Galaxies at $z\sim 2$
• The Effects of radial inflow of gas and galactic fountains on the chemical evolution of M31
• SUPER. VI. A giant molecular halo around a z~2 quasar
• Extended and broad Lyman alpha emission around a BAL quasar at z~5
• An ALMA survey of submillimetre galaxies in the COSMOS field: The extent of the radio-emitting region revealed by 3 GHz imaging with the Very Large Array
• Galaxy Formation Through Filamentary Accretion at z=6.1
• SUPER V. ALMA continuum observations of z~2 AGN and the elusive evidence of outflows influencing star formation
• Detection of a high-redshift molecular outflow in a primeval hyperstarburst galaxy
• ALMA reveals large overdensity and strong clustering of galaxies in quasar environments at $z\sim 4$
• The Ionised- and Cool-Gas Content of The BR1202-0725 System as seen by MUSE and ALMA
• Feeding the spider with carbon -- [CII] emission from the circum galactic medium and active galactic nucleus
• Mapping the Morphology and Kinematics of a Lyman-alpha-selected Nebula at z=3.15 with MUSE
• Getting the model right; an information criterion for spectroscopy
• LineStacker: A spectral line stacking tool for interferometric data
• COLDz: Deep 34 GHz Continuum Observations and Free-free Emission in High-redshift Star-forming Galaxies
• The extended HI halo of NGC 4945 as seen by MeerKAT

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• An investigation of the circumgalactic medium around z~2.2 AGN with ACA and ALMA
• Evidence of extended [CII] and dust emission in local dwarf galaxies
• ALMACAL X: Constraints on molecular gas in the low-redshift circumgalactic medium
• Oxyster: A Circumgalactic Low-ionization Oxygen Nebula next to a Starburst Galaxy at $z\sim 1$
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